Belt dressing and cutting device



Dec. 8, 1953 E. J. LOMAZZO ET AL BELT DRESSING AND CUTTING DEVICE 11Sheets-Sheet 1 Filed Sept. 6, 1949 JNVENTOR S. EDMUND .ILuMAzzn y LL UYDE-MA QUAT ATTORNEY 3% 5% mi mm mw hmm Q Q Na 9w Q QM NQ H .m hl NN \N953 E. J. LOMAZZO ET AL 2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 11 Sheets-Sheet 2 aQ a i [1] I INVENTORS.

EDMUND .IL DMAZZIJ H y LLUYBEMA UAT ATTORNEY Dec. 8, 1953 E. J. LOMAZZOET AL BELT DRESSING AND CUTTING DEVICE ll Sheets-Sheet 5 Filed Sept. 6,1949 INVENTORS. EYIIMUMD J. L DMAZ z a By LLUYIJ EMAUUAT ATTORNEY Dec'8, 1953 E. J. LOMAZZO ET AL 2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 ll Sheets-Sheet 46'0 4. 1N VEN TOR S.

F1 g. InMumJJLm/mzzu BY LLUYD MA UAT Dec. 8, 1953 E. J. LOMAZZO ET AL2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 11 Shets-Sheet 5INVENTORS. E 5 EnMumJJLm/mzzu y .L'L IJYD EMA QUAT A T TORNE Y Dec. 8,1953 E. J. LOMAZZO ET AL 2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 ll Sheets-Sheet 6Dec. 8, 1953 H1. LOMAZZO ETAL 2,66

BEL'I, DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 11 Sheets-Sheet7' 1953 E. J. LOMAZZO ET AL 1,

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 ll Sheets-Sheet 8INVENTORS.

EDMUND J L DMAZ z a y LL UYII E MAQUAT Dec. 8, 1953 E. J. LOMAZZO ET ALBELT DRESSING AND CUTTING DEVICE ll Sheets-Sheet 9 Filed Sept. 6, 1949IN VEN TOR S. EDMUND J. L III/1A2 20 y LL [7Y1] EMA'QUAT ATTORNEY mwwMum W Em w I Dec. 8, 1953 E. J. LOMAZZO ET AL 2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 11 Sheets-Sheet 1omwnN Dec. 8, 1953 E. J. LOMAZZO ET AL 2,661,579

BELT DRESSING AND CUTTING DEVICE Filed Sept. 6, 1949 11 Sheets-Sheet 11A TTORNEY Patented Dec. 8, 1953 UITED STATES PATENT OFFICE BELT DRESSINGAND CUTTING DEVICE Application September 6, 1949, Serial No. 114,154

31 Claims.

This invention relates to new and useful improvements in productionmachinery and has particular relation to a machine for cutting beltsfrom a cylinder or a cylindrical sleeve of belt stock.

An object of the invention is to provide a machine of the characterdescribed, which is adapted for rapid production of V-belts orstraight-sided belts with a minimum of manual effort.

Another object is to provide a belt cutting machine including anexpansible and collapsible mandrel mounting a cushioning sleeve overwhich work is to be disposed, means being provided for dressing saidcushioning sleeve to a cylindrical form and of exact dimension in theexpanded condition of the mandrel, there being locating means on themandrel and sleeve for insuring the identical relationship between suchparts on re-expansion of the mandrel following its 001- lapse.

A further object is to provide a V-belt cutting machine including a headstock, a work supporting mandrel supported from one end and driven bysaid head stock, a tail stock supporting the other end of said mandrel,guide ways above said mandrel, a pair of cutting units supported fromand movable as a single unit along said guide ways, means for movingsaid units to and from cutting relation with work on said mandrel andfor indexing said units along said guide ways longitudinally of saidmandrel, and means for swinging said tail stock from a position alignedwith and supporting the outer end of said mandrel to an inoperativeposition laterally of the latter whereby stock may be placed on and workremoved from said mandrel over said outer end thereof.

Another object is to provide in a machine of the character indicated animproved construction of cutter unit.

A further object is to provide in a machine of the character described,an improved cam knockout means for retracting the cutters from andadvancing them toward the work and stock respectively.

Yet another object is to provide a machine of the character describedwherein the cutters having completed their intermittent movement acrossthe work to cut the same are automatically locked out of the work andmay be given a continuous rapid traverse return movement to theirstarting position, at which latter position they remain until a clutchis thrown.

Other objects and advantages of the invention will become apparent froma consideration of the following detailed description taken inconnection with the accompanying drawings wherein a satisfactoryembodiment of the invention is shown. However, it is to be understoodthat the invention is not limited to the details disclosed but includesall such variations and modifications as fall within the spirit of theinvention and the scope of the appended claims.

In the drawings:

Fig. 1 is a front elevational view showing a machine constructed inaccordance with the present invention;

Fig. 2 is a rear elevational view of such a machine;

Fig. 3 is an end elevational view of the machine, taken as looking fromthe left in Fig. 1;

Fig. 4 is a vertical sectional view taken along the line 4-4 of Fig. 3;

Fig. 5 is a similar view taken along the line 55 of Fig. 3;

Fig. 6 is a detail sectional view showing a braking means, the viewbeing taken as along the line -6 of Fig. 5;

Fig. 7 is a longitudinal sectional view through an expansible andcollapsible mandrel showing the same in collapsed condition;

Fig. 8 is a View somewhat similar to Fig. 7, but showing the mandrel inexpanded condition, the View being taken as along the plane of the line3-8 of Fig. 9;

Fig. 9 is a sectional view taken along the line 99 of Fig. 8 and lookingin the direction of the arrows;

Fig. 10 is a sectional view taken along the line |B-lil of Fig. 8 andlooking in the direction of the arrows;

Fig. 11 is a sectional view taken as along the line ll-ll of Fig. 8looking in the direction of the arrows;

Fig. 12 is an end elevational view of the machine, the view being takenas looking from the right in Fig. l, the tail stock being shown bybroken lines in an open position;

Fig. 13 is a detailed enlarged front elevational view of a carriermeans, the view being taken as looking from the forward side in Fig. 14;

Fig. 14 is a top plan view of the means of Fig. 13;

Fig. 15 is an enlarged front elevational view of the cutter mechanism;

Fig. 16 is an end elevational view looking as from the right in Fig. 15;and

Fig. 1'7 is a further enlarged view, the same being a detail sectionalview taken as along the line i'l-l'l of Fig. 15.

Referring in detail to the drawings, at W is generally indicated thebase of our machine,

said base at one end mounting a gear housing, generally designated H,and at its other end mounting an end frame member, generally designatedl2. Through means within the upright gear housing H, and which means islater to be described, a head H3 at one side of said housing and spacedsubstantially above the base if) is driven and this head supports theinner end of a mandrel mounting spindle [4 (see particularly- Figs. '7and 8) and at the proper time rotates such spindle.

The outer end of the spindle 14, when themachine is in use, is supportedand centered on a tail stock center l mounted by a tail stock generallydesignated i5, and at such times the spin-- dle is supporting anexpansible and collapsible mandrel, generally designated ll. Thismandrel is designed to receive a cushioning sleevewill be cut into aseries of short lengths of equal width. While the machine provides forthe use of an expansible and collapsible mandrel over which is placedthe cushioning sleeve, the ma chine also includes means whereby suchcushioning sleeve will be dressed to a true. cylindrical form by meansgenerall designated 58 and lo cated. at the rear of the machine. Suchtrue cylindrical form of cushioning sleeve is necessary for thereception of the work piece in the form of a cylinder to the end thatthe belts cut from such work piece will have linear edges. Further, the.machine provides for the automatic cutting of the work piece into beltsof equal widths and the general purpose of the machine is the rapidproduction of drive belts and generally of V- belts, although themachine is not necessarily limited to the production of V-belts but maybe used for the production of transversely rectangular belts.

The present machine is powered preferably from an electric motor (notshown) through a change speed gearing (not shown), such source of powerbeing used to drive a coupling i9. This coupling, through suitablemechanism later to be described, may be used for expanding andcollapsing and driving or rotating the mandrel ll. Also, this couplingoperates through a drive to be described for intermittently feeding thecutter mechanism, generally designated 29, outwardly from the head itand longitudinally with respect to the mandrel El, during the cutting ofa work piece into belts.

A small electric motor 2! provides for a rapid traverse or quick returnof the cutter mechanism following the operation of cutting a sleeve orpiece of work into a plurality of belts. A second small electric motor22 comprising a part of the dressing mechanism It, provides the powerfor rotating a grinding wheel 23 forming part of such dressingmechanism. The cutter device 20 includes a pair of cutting knives 2:3and 25 and independent motors 26 and 2? for driving such knives, all aswill later be pointed out in detail.

The coupling 19 serves to drive a shaft 23 passing through a bearinghousing 29 mounted on the outer side of the wall 30 of gear housing IIand then passes into and across the gear housing ll, being suitablymounted in bearings Eil and 32 carried by the walls 36 and 33 of thehousing. H. inwardl of the housing wall 39, a dual gear including alarge diameter gear 3:1 and a smaller diameter gear 35 is keyed orotherwise fixedly secured to the shaft 28. Then, spaced inwardly alongthe shaft, a relatively small gear 36' is keyed or otherwise fixedlysecured thereto. At the inner side of gear 35 a dual gear, including alarge diameter gear 31 and a smaller diameter gear 38, is mounted on asleeve or otherwise whereby it is freely turnable about the shaft 23 asan axis. A tubular sleeve or filler 39 extending between the gear 38 andbearing 32, properly locates the gears 37 and 38 on the shaft 28.

In parallel relation with the shaft 28. and also within the gear housingH is a shaft 49 jour.

nalled at its respective ends in bearings 4! and 42 carried by thehousing walls 3%! and Freely turnable on this shaft 59 is a gear atadapted.

to be selectively connected with the shaft by a clutch element cs. Suchclutch element 44 is. part of a clutch structure generally designated.45 and which, in addition to the element 44, includes an element 26, ashifter :21, a yoke 48 for operating such shifter and a bar or rod 49fixed to the yoke and extending to the front. side of the machine andthere being fixed to a. hand lever or manual 50.

On the shaft ie and beyond, theclutch 35, isa. second gear 5i turnableabout the shaft ii] as an axis but adapted to be selectively connected.or coupled with. the shaft through the clutch element 46. Then, beyondsuch relatively largev gear of there is a smaller gear 52 keyed directlyto the shaft till. A stub shaft 53' mounts an intermediate 0r reversinggear Ed in a position lat.- erally of the gears 35 and 43 but in meshwith such gears whereby to establish a drive between them.

Rearwardly of the shaft 28, but in substantially horizontal alignmenttherewith, a shaft 55 extends across the gear housing ll and isjournalled in bearings 56 and 51. Shaft 55 has turnably mounted thereona gear 58 adapted to beselectively coupled with the shaft through aclutch element 59 comprising part of a clutch structure generallydesignated 6% and also including a clutch element 6|. The clutchelements 59 and GI are selectively rendered operative on the shifting ofa collar or shifter 62 by means of a yoke 63 fixed to a shaft 6A whichextends at the forward side of the machine and there has fixed to it alever or manual 65.

Turnable about the shaft 55 as an axis and located on said shaftinwardly of the clutch element 6!, is a relatively large diameter gear66 adapted to be selectively coupled with shaft 55 by the clutch element6!. It is shaft 55 which, through connections later to be described,serves to drive the mandrel spindle I4 and thus to expand or collapsethe mandrel I l or to provide the necessary power for the driving orrotating of this mandrel during a cutting operation.

With the gearing described, the drive of the shaft 55 may be in onedirection or the other to expand or collapse the mandrel and then thereis a substantially straight line drive for rotating the mandrel during aWorking operation. In the expanding and collapsing of the mandrel, abrake mechanism is used, which brake mechanism will later be describedin detail, but here it is thought best to include a description of themanner in which the gearing already described may be employed fordriving the mandrel.

It is intended that the shaft 28 shall be continuously driven during anyperiod of use of the machine. If the mandrel is to be either collapsedor expanded, but assuming that it is to be collapsed, the drive is fromshaft 28 through gear to gear 54 to gear 43 which is now coupled withthe shaft lll through the clutch element 44. Shaft being driven, itthrough gear 52 drives the gear 31 and the latter being integral withgear 38, such gear 38 is driven and drives the gear 66 which is nowcoupled with the shaft through the clutch element 6| whereby shaft 55and thus the mandrel spindle I4 is rotated in one direction. At thistime, the brake means above referred to is applied to hold a part ordrum against rotation and the mandrel is collapsed.

In the collapsed condition of the mandrel, the belts are removed and anew piece of work applied to the mandrel and then the latter must beexpanded. To accomplish this, the operator manipulates clutch 45 todisconnect gear 43 from the shaft 40 and to couple the gear 5i with theshaft 40. Clutch may stay in the position already described, through itselement 5| coupling the gear 66 to shaft 55. Now the drive avoids theintermediate or reversing gear 5% and is from shaft 28 through gear 35to gear 5 i. The latter gear being coupled with the shaft Ail throughthe element 45, shaft 49 is driven and through gear 52 drives gear 57and thereby gear 38. The latter meshing with gear 65, shaft 55 is drivenin the opposite direction to that first described. At this time, thementioned brake being again applied to prevent rotation of the drum, themandrel will be expanded as will later more fully appear.

When the mandrel spindle I4 is to be driven so as to rotate the mandrelduring the operation of cutting belts from a piece of stock, the driveis again from shaft 28. At this time, the drive is through gear 34 togear 58 which is mounted on the shaft 55. Now the clutch 45 is inneutral position, but the clutch 55 is shifted so as to have its element59 couple the gear 58 directly with the shaft 55 whereby the latter issubstantially 7 directly driven and, of course, serves to drive themandrel spindle I4.

Fixed to rotate with the shaft 55 is a tubular shaft or sleeve 61, whichparts may be integral. Check nuts 68 at the inner side of wall 33restrain outward movement of this structure. Sleeve Bl extends into thedriving head 53 and comprises the means by which motion is transmittedto the driving head from the shaft 55. A bearing member 69 mounted bythe housing wall 33 supports the tubular shaft 57. Within an opening 10through the means 55 (see Figs. 7 and 8) there is mounted a sleeve lihaving a laterally extending flange T2 at its outer end, and this sleevetoward such outer end mounts antifriction bearings 13 for the hollowshaft or spindle 61. A plate 14 assists in maintaining these bearings inplace and the plate and the sleeve member H are secured to the 59 bybolts 15. of the hollow spindle 61 is an inner head-like portion 16 atits forward end carrying lugs or keys 11.

Mounted on this head-like portion, but adapted to be held againstturning movement therewith,

Shown integral with the outer end is a drum I8 mounted as onanti-friction bearings 19. Toward its inner end, the spindle l4 includesa substanatially cylindrical portion 80 and inwardly of such portion atapered or cone portion Bl the latter being received in a similarlyshaped opening through the inner head 16. A rod 82 may be connected withthe inner end of the spindle and such rod will be provided with suitablemeans whereby the spindle will be drawn tight into the cone-shapedsocket provided in the inner head 16.

A nut 83 may be threaded to the head 16 to keep the bearings 19 inplace. Fixed to the spindle M at about the juncture of its portions 80and BI, or formed integral with the spindle at this point, is a collar84 having sockets or openings therein. In number, such sockets oropenings equal the number of the keys 7'! fixed to the forward side ofthe inner head 76 and are adapted to receive these keys. With thisconstruction, it will be apparent that as the inner head is rotated, thespindle [4 must rotate with it, being made fast to it for the purpose ofrotation by means of the keys 7'! entering the openings or sockets inthe collar 84.

An externally threaded sleeve 85 is disposed over the cylindricalportion of the spindle I4 and is secured thereto for turning movementtherewith, and for sliding movement in the direction of the lengththereof, by an elongated key 85. Threaded onto this sleeve is a nut 81having its inner end made fast to the drum 18 by screws or bolts 83. Themandrel H is mounted on the spindle l4 and (see Figs. 7 and 8) it ishere noted that this mandrel includes an inner sleeve 89 mounted on thespindle [4 to turn therewith and also for limited movementlongitudinally thereof.

Located between the inner end of sleeve 89 and the outer end of thethreaded sleeve is a tubular adaptor or extension 90. On the outer endof the externally threaded sleeve 85, keys 9| are secured and these keysare received in sockets or recesses formed in the inner end of theadaptor 90. Also, a tubular nut 92 is designed to turn about the outerend portion of the externally threaded sleeve 85 and to be threaded ontothe inner end portion of the adaptor whereby to couple these parts. Suchcoupling so locates the parts that the keys 9! rigid with the sleeve 85are located in recesses in the adaptor 90 whereby any turning movementof the sleeve 85 is transmitted to the adaptor 90.

A disc 93 is fixed to the inner end of the mandrel sleeve 89 as byscrews 94 and a suitable number of keys 95 are fixed to the outer end ofthe adaptor 9B. The disc 93 has a number of recesses or notches equal tothe number of keys 95 and, in the assembly, such notches receive suchkeys. Then, a nut 96 turnable about the inner end of the mandrel sleeve89, is threaded on the outer end of the adaptor 9!! coupling these partsand securing them in relation, with said keys 95 entering notches orrecesses in the disc. With this construction, any turning movement ofthe adaptor 95 is necessarily imparted to the mandrel sleeve 35.Further, it will be seen that on turning of the nut 95 to release itfrom the outer end of the adaptor at, there is no connection between themandrel ii and any portion of the head l3 and thus the mandrel may bemoved outwardly along the spindle i l. Here it is noted that such adisconnection is made when a larger or smaller mandrel is to besubstituted for the one then on the machine.

In addition to the sleeve 89, the mandrel I! inaecrs'ze cludes anannular plate or disc 91 having a hub? portion 98 and integral With suchhub portion. there is an outwardly extending reduced diameter externallythreaded sleeve 99. One or more elongated pins I pass through the hubportion 98 and may slide back and forth therethrough. Threaded on the.sleeve 99 is a stop device in the form. of a collar WI, and such collaris adapted to be adjusted along the sleeve to limit the extent to whichthe pin or pins m0, may be pushed outwardly through the hub portion 90.A nut '02 is clamped on the outer end portion of the spindle I4 in aposition against the outer end of the externally threaded sleeve 99whereby such sleeve and the entire mandrel I1 is held against movementoutwardly longitudinally of the spindle I4.

At suitably spaced points, the sleeve 89 is provided with inner andouter sets of lugs I03 and I04. The number of sets of lugs employed willdepend on the number of segments in any particular mandrel. The lugs ofeach set are arranged radially about the sleeve 89 and each lug of theinner set is measured along the length of the sleeve, aligned with or inthe same plane with its corresponding lug in the outer set. Measuredtransversely of the sleeve, the alternate lugs of the inner set and thealternate lugs of the outer set are slightly offset with respect to oneanother so that transversely the alternate lugs of the outer set of lugsare in slightly different planes and the same is true of the lugs of theinner set. It is noted that such an. arrangement permits of making anexpansible and collapsible mandrel having an exceptionally large numberof segments.

Sets of inner and outer links I and I06, all of the same length, areemployed and each link I05 at its inner end is secured by means of a pinI01 with a pair of the lugs I03 while each link I00 at its inner end issecured by means of a pin I08 with a pair of the lugs I04. These pinspivotally attach the inner ends of the links to the sleeve 89. -A seriesof segments I09 are provided, each having an arcuate outer surface, allsegments having their outer surface on an arc of a circle. Each segmentis also provided with inner and outer sets of lugs I I0 and I II andpins I I2 secure the outer ends of the links I05 with the lugs IIO,

while similar pins I I3 secure the outer ends of the links 100 with thelugs III. With the described construction, it will be seen that throughthe links I05 and I06 the segments I09 are connected with the sleeve 99,but there may be relative radial movement between the segments and thesleeve 89 as the links I05 and I06 swing on their pivots or on theirpivotal connections with the sleeve and the segments.

Toward its outer end, each segment I09 carries a roller I I4 and theserollers are adapted to travel in radially extending guide slots II5 (seeFig. 10) in the inner face of the disc 91. Similarly, screws IIB attachto the outer end of each segment I09 a lug H1 and these lugs areradially arranged and each extends inwardly and overlaps the outer faceor side of the disc 91. Since the rollers I I4 bear against the innersurfaces of the slots H5 of the disc 91 and the lugs II1 bear againstthe outer face of said disc and these parts are rigid With therespective segments I09, it will be understood that such segments aresecured against movements in the directions of their lengths by the disc91 but may move radially outwardly and inwardly with respect to saiddisc. Thus, the mandrel 11 may be expanded from the collapsed positionof Fig. 7 tov the expanded condition of Fig. 8 and from such expanded tosuch collapsed condition.

A brake band H0 having a suitable friction lining I I9 has one endanchored as on a pivot or pin I (see Fig. 6) and is carried about the;drum 18 and has its other end fixed to a connector I2iIi including anadjustable threaded rod I22. This connector I2I also includes abifurcated portion or fork I23. connected by a pivot I24 with a leverincluding ashort arm I25 and a longer arm I26 comprising a. handle. Thementioned lever, which is here generally desginated I21, is pivoted atI28 on a bracket I29 fixed to the outer side of the wall 33 of the gearhousing I I.

A coil spring I30 is. anchored at one end as toa pin I3I rigid with thewall 33 and at its. other end is anchored to a pin I:32 forming part ofthe connector I2l. At I33 there is a pin fast withthe bracket I29 andacting as a stop to limit clockwise movement of the lever I21 about its:pivot I28. Clearly, the spring I130, is constantly under tension and istrying to maintain the lever I21 in the position of Fig. 6' with thebrake released from the drum 18. Also, it will be clear from Fig; 6 thaton manual rocking of the lever I21 in a counter clockwise direction, thebrake band I I8 will be tightened to tighten the friction lining I I 9against the drum 18 whereby to frictionally hold the latter againstturning movement.

Assuming the mandrel to be collapsed as in. Fig. '7, a cushioning sleevecomprising a sleeve or heavy hollow cylinder I34v of rubber is. slippedover the mandrel from its outer end, the tail stock It being in openposition, as will be described. For the purpose of maintaining thiscushioning cylinder I34 in the same relation tothe segments of themandrel on re-expansion of the latter following its collapse from aonceexpanded position with the cushioning sleeve thereon, at least onesegment I99 of the mandrel is provided with a key. In the drawing, suchkey is designated I35 and is shown as extending longitudinally of amandrel segment I09 and for substantially the length of such segment.

In placing the cushioning sleeve I34 on the collapsed mandrel, a grooveor keyway I35 (Figs. I6 and 17 in such sleeve is aligned with andreceives the key I35. After the cushioning sleeve I34 is in position onthe collapsed mandrel, then a piece of work I31 is placed over suchsleeve I34, the piece of work I31 comprising a cylinder of rubber orcomprising a laminated structure including rubber, cloth and the like.This piecev of work will be slipped over the sleeve I94 from the outeror tail stock end of the mandrel, the tail stock being then in an openor out-of-theway position.

The cushioning sleeve and the Work piece being on the collapsed mandrel,the operator manipulates the lever or handle 50 to operate the clutchand engage its element 46 so as to couple the gear 5| to the shaft 49'.Also, he then manipulates the handle or lever 55 to have the clutch 00couple the gear cc to the shaft 55 and thus to the tubular shaft 01. Theclutches being coupled as described, the drive is from the shaft 28through gear 35 to gear 5i which is now coupled with the shaft 45'- bythe clutch element 45. Further, the drive is through gear 52, which iskeyed to shaft 40, to gear 31 and hence to gear 38, which gears areturnable about shaft 28, to the gear 50 which is coupled with the shaftthrough the clutch element 6|. Consequently, the hollow spindle or shaft51 and thus the inher head 76 and the spindle I4 are being driven. Atthis time, the operator is grasping the brake handle I 26 and applyingthe brake to the drum l8 and thus the latter is being frictionally heldagainst turning movement with the head '36 and the spindle I l and theexternally threaded sleeve 85.

Since the drum '53 is held against turning movement with the otherparts, the nut 8'! being secured to said drum by the bolts 83 is heldagainst turning movement and the sleeve 35 being fixed to the spindleportion 33%) by the key 85 is threaded outwardly with respect to the nut87. As this occurs, said sleeve being connected with the adaptor as andthus with the sleeve 89 of the mandrel, the latter sleeve is shiftedoutwardly as from the position of Fig. 7 to or toward the position ofFig. 8. As the sleeve as is fed outwardly along spindle It, the sets oflinks I and I98 have a thrust applied to them which they transmit to thesegments E89.

Because of the engagement of the rollers II l with the inner surface ofthe plate or disc 9?, the segments cannot move in the directions oftheir lengths so the thrust applied to them through the links results intheir moving outwardly radially with respect to the sleeve 89 or in adirection to increase the effective diameter of the mandrel. Thediameter to which the mandrel is to be expanded is known and depends onthe work in hand and, accordingly, the stop I BI has previously beenadjusted on the threaded tubular portion 99. Therefore, as the sleeve 89is fed by the threaded sleeve d5 screwing itself out of the nut 8?, theforward end of the sleeve 85 strikes the inner ends of the pins t lt andthese pins may move outwardly until they engage the stop IilI. When thisoccurs, it is merely necessary that the operator release the brakehandle whereupon nut 83 and drum is are retated with other portions ofthe head and mandrel and there will be no further attempt to expand thelatter.

After work on the mandrel has been out into belts, it is then desirableto collapse the mandrel whereby to reduce its eifective diameter andpermit of the work being more readily removed from the mandrel. In thisconnection, it will be understood that after a piece of work has beenplaced on the mandrel, the latter is expanded to forcefully engage thecushioning sleeve I34 and expand the latter to forcefully engage it withthe inner surface of the cylindrical work piece I37 whereby to slightlyexpand the same or at least put a tension on the work piece. The purposeof the cushioning sleeve is to protect the cutter knives 2t and as theycut through the work piece it? in operation of the machine, thecushioning sleeve preventing said knives from coming into directengagement with the metal mandrel segments.

To collapse the mandrel to permit of easier removal of the out workpiece from the sleeve I3 5, the levers lit and $5 are returned to orshifted to positions such that the clutch element is disconnected fromthe gear 5I and the clutch element it is coupling the gear 43 to theshaft 48. At this time, the lever 85 is in position to have the clutch5t functioning as previously described, that is, serving to couple thegear with the shaft 55 through the clutch element 5i. Thus, the gear 6%is coupled to drive the hollow shaft 6? and'the driving head I3, a haspreviously been set forth.

Now the drive from the shaft 28 is through gear 35 to the reversing gear54 and thence to the gear 453 which, being coupled with shaft til,drives the latter and through gear $2 keyed thereto and meshing with thelarge gear 31, drives the small gear 38 and thence the large gear 66which is coupled with aft 55 by the clutch element 6i. Owing to the useof the intermediate or reversing gear the mandrel will now be rotated inthe opposite direction. At this time, the operator grasps the brakehandle I 26 applying the brake to the drum head I8 thereby holding thenut ill against revolving with the threaded sleeve 85. However, thissleeve continues to revolve or turn with the spindle I4 and the innerhead it and thus the sleeve is fed or threaded inwardly into the nut8'5.

Through the coupling nuts 92 and 9B, the sleeve 85 is connected with thesleeve 89 of the mandrel and thus such latter sleeve will be drawninwardly moving the inner ends of the sets of links I65 and Ill-S towardthe left from the position of Fig. 8 and toward the positions in whichthe links are shown in Fig. 7. Such movement results in a pull beingtransmitted through the links to the segments I89 but owing to the factthat the lug I'I'l are rigid with the forward ends of these segments andthat such lugs overlap the outer end or side of the plate 97, the barscan have no longitudinal movement in the direction of this pull.Therefore, the mentioned pull or draw transmitted through the links I05and I06 resolves itself into a movement drawing the segments Hi9radially inwardly toward the sleeve 89 reducing the effective diameterof the mandrel.

At this time, the out work or product is removed from the cushioningsleeve I34 and a new piece, a cylinder, of work is disposed over thecushioning sleeve and then the mandrel is again expanded by the drivefirst described above. In this connection, it will be understood that solong as the work is of the same size, the stop MI is left in positionand during the expanding of the mandrel, the operator does not have tokeep measuring the mandrel or work to see if proper expansion of themandrel and thus of the Work has been obtained.

When the sleeve 89 pushes the pins I00 hard against the stop Itl, themandrel is expanded to the desired extent and cannot be furtherexpanded. At this time, in order to hold the drum I8 and nut 81stationary, a very considerable pull on the brake lever or handle I26 isrequired and the operator knows that proper expansion has been obtainedeven though he does not look to the position of the pins Itt at theouter end of the mandrel. He therefore merely releases the brake leverknowing that the desired expansion has been obtained.

At its outer end, the spindle I4 is centered and supported on the centerI5 of the tail stock I6. To preventwear in the spindle it (see Figs. 7and 8) the latter does not bear directly on the tail stock center I5 butis'bored in its outer end to receive the stem I 38 of a bearing head I39having a tapered socket I la in its outer end to receive the cone pointof the tail stock center I5.

Should the socket Mt wear, then the head I39 is replaced by withdrawingits stem from the outer end of the spindle I4 and mounting a new head onthe outer end of such spindle.

Tail stock I6 (see Figs. 1, 2 and 12) is mounted by the upright frameportion I2 which is shown as secured to the base Ill as by bolts I 4|.This upright is provided in its forward side and intermediate its endswith a bracket I 42 having an outwardly projecting central ear portionI43.

The tail stock includes a body I44 made up generally of a pair of armsI45 and Hit, the latter being a bifurcated construction and at its lowerend turnable on or with a pivot member or shaft I SI passing through theear I43 and which may be either rigid with the ear or rigid with thebifurcated arm portions I IS whereby body I44 is pivoted for movement asfrom the operative full line position of Fig. 12 to the machine loadingbroken line position of that figure.

The body I54 at the juncture of its arms I45 and I46 is provided with acylindrical construction I48 which mounts the tail stock center I forlongitudinal adjustment, such adjustment being controlled as by a handwheel Ifla and the spindle being locked in its projected or retractedposition through manipulation of a hand piece 39.

Arm I has an end portion I52 which, in the operative position of thetail stock, enters between the adjacent portions of a pair of cylindersI5I. This portion I58 has sockets I53 opening through its outer sidesand the cylinders I5I mount bolts I54 for projection into such socketsI53 to lock the body M5 in its operative position and which bolts areadapted to be withdrawn from such sockets to permit of the body beingswung to the broken line position of Fig. 12. Preferably, the socketsI53, and bolts I54 are slightly tapered so as not only to lock the bodyI48 in its operative tion, the cylinder IE5 at its lower end ispivotally mounted at I56 and the piston rod I51 extending I through theupper end of the cylinder is pivoted at I58 to a short arm or sectionI59 projecting from the underside of the cylindrical portion I48 of thetailstock but rigid with the latter. On fluid, as air, under pressurebeing admitted to the upper end portion of the cylinder I68, the lockingand centering bolts I54 being withdrawn from the portion I553, the tailstock will be swung from the full to the broken line position of Fig.12.

Preferably, opening of the tail stock opens a con- Y trol switch (notshown) shutting off power to all the'motors, including the motors 26 and21.

It is noted that the body I44 has an arcuate side I'B'I and when thebodyis in the open position of Fig. 12, such arcuate surface IGI is concentric with the mandrel IT or the mandrel spindle I4 and so certainsizes of work may be disposed onthis arcuate surface and then pushedonto the mandrel over the cushioning sleeve I34. The work having beenpushed on the mandrel, the fluid under pressure will be then exhaustedfrom the upper end portion of the cylinder I60 and will be supplied tothe lower end portion of the latter forcing the piston rod I51 backupwardly to the full line position of Fig. 12 and returning the tailstock to its operative position. Now the bolts I54 will be advanced intosockets I53 lockingthe tail stock in place and the wheel I l8a may beoperated-to advance the tail stock spindle. I5. to operative position,in which latter I2 (see 12 position the tail stock spindle may be lockedby manipulation of the handle I49.

When, during use of the machine, a cushioning cylinder I34 becomes sodamaged by being cut as to not have further useful life, then in suchinstance the damaged sleeve is removed and a new sleeve applied. The newsleeve is applied while the mandrel is collapsed and its segments havetheir adjacent longitudinal edges relatively close together. Then, whenthe mandrel is expanded, the longitudinal edges of its segments arefurther spaced apart and are applying a pressure to the cushioningsleeve so that the latter develops slight flats in its portions whichare not directly supported by the mandrel segments. If permitted toremain, these flats would be transmitted to a cylinder of work about thesleeve and then, as belts are cut, their edges will be wobbly or unevenand will not be curvilinear as is desired. That is, a belt out under thementioned conditions will not be of uniform width between its side edgesthroughout its length.

To avoid this, we have provided a dressing mechanism generallydesignated I8 above and including the motor 22 and the grinding wheel23. This dressing mechanism is mounted on or by a bridge-like supportingstructure I62 located at the upper rear side of the machine and at oneend is supported as by bracket I63 while its other end is supported byframe piece I2. Extending along at the underside of the bridge I52 is ashaft I65 having a threaded portion I66 forming a feed screw for thefeeding of the dressing mechanism longitudinally of the machine. Thisshaft is equipped with a pulley IG'I driven as by a belt I58 alsotrained over a pulley I69 on the shaft of a small motor IIII fastened asby bolts Hi to the rear wall of the gear housing II.

The bridge I62, at its rear edge, includes a flat rail-like portion I12(see Fig. 3) and at its front upper edge includes a V-rail I I3. At theunderside of the bridge is a mounting plate IT I which is supported fromthe bridge by means of an inverted L-shaped suspension piece I15 boltedto the mounting plate by a bolt I'IEi overlying the flat rail I12 and bya second inverted L-shaped suspension piece I I1 secured to the forwardside of the mounting plate as by bolts I18 and having a way receivingthe upper side of the V-rail I13. In this way mounting plate I'I I issuspended from the bridge I62 but is adapted for guided mov mentlongitudinally of the bridge.

At its underside, a mounting plate I14 has a dovetail projection I79received in the dovetail Way in the upper side of a bracket I80. A screwI8I in the supporting plate I'M is mounted for turning movement only andis adapted to be turned by a hand wheel I82. This screw is threadedthrough a nut I83 fast with the bracket I whereby on rotation of thescrew the bracket will be fed in direction transversely of the machine,either inwardly or outwardly thereof. This bracket I80 extends forwardlyinto the machine, as best shown by the dotted lines in Fig. 3, and inits lower end is provided with a way receiving a dovetail slide or key I84 fast with the motor 22 and by which the motor is mounted. screws orother fastening means I85 are provided for locking the key on slide I84in the desired position in the dovetail channel provided in the lowerend of the bracket I80.

A member I86 is movable with the supporting member I14 and at its upperside carries a split nut construction IBI adapted on manipulation of thehand piece I83 to be engaged with or disengaged from the threaded shaftportion I66. When this split nut I81 is engaged with said threadedportion of the shaft, it will be clear that as the shaft is rotated inone direction or the other, the entire dressing device I8 will be movedlongitudinally of the machine in one direction or the other.

On the upper side of the bridge I62, toward the forward edge of thelatter, there is secured a rack I89 with which engages a gear wheel I90on the inner end of the shaft I9I, while on the outer end of such shaftis a hand wheel I 92 adapted to be locked to the shaft as by a pin I93or the like. With this construction, it will be seen that on release ofthe split nut I81 from the threaded shaft I69 and on turning of the handwheel I92 while locked to the shaft I 9I, the gear I90 will be turnedand travelling along the rack I89, the entire dressing mechanism will befed longitudinally of the bridge.

A pair of uprights I94 extending upwardly from the bridge I62 serve tomount an L-shaped member I95 on the lower side and toward the ends ofwhich are mounted a pair of limit switches I96 and I 91 having handlesI98 and I99, respectively. Fixed to the inverted L-shaped suspensionpiece I 11 and extending upwardly therefrom is a T-shaped member 200,the head of which is at such elevation as to engage switch handle I98 orswitch handle I99 at the limit of movement of the dressing mechanism I8in either direction.

With the described construction, a cushioning sleeve I34 having beenplaced on the mandrel and the latter having been expanded, the operatorwill locate the key I84 at the proper place in the way in the undersideof the bracket I and then tighten the locking screws I85. This willplace the grinding wheel 23 approximately in contact with the expandedcushioning sleeve. Then the dressing device being at one end of themachine, as toward the head of the machine (toward the left in Fig. 2),the operator may start the motor 22 and also the motor I and manipulatethe hand wheel I82 to feed the bracket I90 inwardly carrying thegrinding wheel 23 against the cushioning sleeve which is being rotatedby the mandrel.

The feed screw I66 will cause the dressing mechanism to be fedlengthwise along this cushioning sleeve and the latter will be dressedor ground off removing its high places and rounding its flats to form itinto a true cylinder. It may be necessary to pass the grinding wheelseveral times over the sleeve in order to obtain a real cylinder andtherefore, when the feed screw has fed the mechanism to its outermostposition (its extreme position toward the left looking at the back ofthe machine as in Fig. 2) the member 200 will engage the switch handleI98 and operate a reversing starter to the motor l10.

Now the dressing mechanism is given a reverse movement and the grindingwheel 23 carried back across the work. At the end of this reversemovement, member 200 engages switch handle I99 again causing reversal ofmotor I10 whereby the grinding wheel 23 is carried back across the workin the direction first described. In this way the dressing or grindingwheel may be passed over the cushioning sleeve the desired number oftimes until said sleeve is formed into a perfect cylinder of the desireddiameter. When the sleeve is dressed, the motor I10 is stopped and theoperator releases split nut structure I81 by manipulating hand piece I83and turns hand wheel I92 to feed the dressing mechanism back i4 to itsstarting position. Thereafter, pin I93 is released and split nut I81re-engaged with the feed screw.

This dressing wheel is advanced against the cushioning sleeve bymanipulation of the hand wheel I82 for the dressing operation and may bedrawn back from engagement with the sleeve for the return movement ofthe dressing mechanism by the hand wheel I92. The adjustment provided bythe key I84 and the way in the lower end of the bracket I is onlynecessary when different sizes of mandrels and thus different diametersof cushioning sleeves are employed and to avoid the necessity for anymajor adjustment by manipulation of the hand wheel I82.

On the upper end of the gear housing II is a second and smaller gearhousing 20I while on the upper end of the vertical end frame member I2and in a position opposite said gear housing 29I is a cross head 202,the latter being secured in place as by bolts 203. This cross head 202has a pair of openings 299 and 295 of relatively large diameter for thereception of supporting and guide bars to be identified, and a pair ofsmaller openings 2% and 201 for receiving the ends of a cam shaft and ashift rod, respectively, and a bearing 29:3 for the reception ormounting of the outer end of a feed screw also to be identified.

Within the bearing 29, a bevelled gear 209 is fast to the shaft 29 andmeshes with a second bevelled gear 2I9 fixed to the inner end of avertically inclined shaft 2 which, through a shaft section 2 I 2 and apair of universal couplings 213 and 21 3, is connected to drive a shaft2I5 entering a gear casing 2I6 at the outer side of the upper gearcasing 29l previously referred to. Fixed to shaft 2I5 is a worm 2I1meshing with a worm gear 2I9 fast on a shaft 2I9 extending through thegear housing 20I and at the inner side of the latter connected asthrough a coupling 229 with a cam shaft 22I, which latter extends forthe length of the machine and has its outer end mounted in the openingor bearing 209 of the cross head 202.

Fast on the shaft 2 I 9 is a roller carrying driving element 222 forintermittently engaging the star wheel 223 of a Geneva movement. Suchwheel 223 is fast on a shaft 224 along with a relatively large gear 225.Gear 25 meshes with a gear 223 on a stub shaft 221, which shaft at theouter side of the casing or housing 20I is adapted to drive a secondstub shaft 228 through a pair of meshing gears 229 and 230. Within thehousing 20I, shaft 228 has fixed to it a clutch element 23L Shaft 229 isaligned with the inner end of a shaft 292, which latter is a feed screwand turnable on the shaft 232 within the housing 20! is a gear 233.However, the gear 233 is adapted to be coupled with the shaft by clutchmeans 234.

A shiftable clutch element 235 is adapted for movement by a yoke 239fixed to a shaft 231 extending to the outer forward side of the housing26" and there provided with a hand lever or manual 238. During operationof the machine in the cutting of belts from a piece of stock, clutchelement 235 is coupled with clutch element 29I whereby through the abovedescribed Geneva movement, intermittent movement is imparted to the feedscrew 232 while the cam shaft 222i is constantly rotated, it beingcoupled or connected by the means 220 with the shaft 2 I9.

At the end of a cutting operation, means are provided for returning thecutting mechanisms to their starting position adjacent the outer end ofthe mandrel. Such means or rapid traverse includes the motor 2! whichthrough pulleys 239 and belts 24!) drives pulleys 24! fixed to a shortshaft 242 entering the housing .and there. equipped with a gear 243which constantly meshes with the gear 233. At the end of a cuttingoperation, the motor 2! is energized and through the described mechanismdrives the gear 233 and thus the feed screw 232 in a direction reverseto its direction of operation so as to return the cutters to startingposition with a continuous rather than an intermittent movement. At thistime, the clutch element 23:": will be uncoupled from the clutch element23! so that the latter will be turning freely and will not oppose thisreverse movement of the feed screw 232.

A pair of relatively large diameter supporting and guiding bars 244 and245 are mounted parallel with one another and parallel with the feedscrew 232 and the cam shaft 22!. Bar 244 is supported at its inner endfrom a wall of the gear housing 20! and at its outer end in the opening224 of the cross head 202, while the bar 225 at its inner end issupported from a bracket 246 on the rear wall of the housing 2!)! and atits outer end in the opening 205 of said cross head.

A shifter rod 24'! has its outer end passing through the opening 26'! inthe cross head and at its inner end this rod passes through guides 22Band between them is fixed to an operating lever 249 which, through amember 2553, is attached to an extension of the shaft or bar 23? abovedescribed as operable by the lever 238 for manipulating the clutchoperating yoke 236.

Theguide bars 2!! and 245 serve to mount and A to guide movement of acarrier and operating mechanism generally designated 25!, shown en--larged in Figs. 13 and 14. The carrier comprises a pair of cross members252 and 253 having cylindrical or eye structures 252 at their ends andslidable on the bars 244 and 245. Then a plate 255 has corner ears lyingagainst and secured to web portions of the cross members 252 and 253 andrigidly secured to the latter as by screws or the like 256. The feedscrew 232 passes through tubular enlargements 25'! in the webs of themembers 252 and 253 and also passes through a pair of nuts 258 and 259supported from the plate 255 and'located at the underside of the latter.

Nut 258 is rigidly held to the plate while nut 259 i is adjustable inthe direction of the length of the feed screw on tightening of the nuts2% on threaded shanks 26 [fast with said nuts 259. This is to insureagainst any end play in the feed screw relative to the carrier 25!.

Extending through a pair of vertical enlargements 252 and 263 of thewebs of the members 252 and 253 are a pai of vertical posts 254 and 265provided on their forward faces with rack teeth 26% and 25?,respectively. A shaft 268 is arranged somewhat diagonally at the upperside of the carrier 25! and at its respective ends has gears 269 and 27Bmeshing with the respective racks 266 and'28l. Fixed to said shaft 268is a worm wheel 27! with which meshes a worm 212 on a shaft 273 equippedat its forward end with a relatively large hand wheel 2'52. With thisconstruction, it will be seen that on turning of the hand wheel iii, theposts 255 and 285 will be moved vertically upwardly or downwardlydepending upon the direction in which the hand wheel is turned.

These posts, at their lower ends, support the cutter mechanisms 22, aswill be described, and they are adjustable vertically as above set forth16 in order to locate such cutter mechanism in the proper position,vertically, with respect to work of different diameters. Following avertical ad justment of these parts, they are locked in ad iustedposition by the tightening of screws 215 passing through split portions216 at the undersides of the enlargement 262 and 263. A trip member 277is provided on one edge of plate 255 to ride along and impart, at'theproper times, movements to the shifter bar 241.

Mounted by the carrier 25!, for vertical movement relative thereto andalso for movement in the direction of the guide bars 243 and 245 withsuch carrier, is a frame 258 comprising side plates 2'19 connected by abolt 28!! mounting a roller or wheel 22! between said side plates. Attheir lower ends, these side plates are connected by a part 282 to whichis secured a depending rod 283, the purpose of which will appear. Thecam shaft 22! passes through the frameZlB and while this shaft iscontinuously rotated as above described, it is provided with alongitudinally extending keyway 282 through which a cam 285 is connectedto such shaft for rotation therewith.

Clearly, the cam is slidable along the shaft as it will be understoodthat this cam moves with the carrier 25i when the latter is fed inwardlyand outwardly along the guide bars 252 and 245 by the feed screw 232.Cain 285 is part of an assembly including a roller 286 and a disc orplate 28], the edges of the latter being received in grooves provided inthe opposing faces of arms 258 of a yoke member 289 secured to theforward end of the piston rod of a cylinder and piston construction 2%.

On fluid under pressure being supplied to the outer end of the cylinder29!, the piston 29-2 is moved forwardly in the cylinder and operatingthrough the yoke 229 and the disc 23? forces the cam 285 from beneaththe roller 28! and brings the roller 286 to a position beneath theroller 28!. The roller 28! now rests on the roller 286 but up and downmovement will not be imparted t0 the roller 2.8! and thus through theframe 218 to the rod 283. However, it will be understood that when theroller 285 is on the cam 285, as the cam rotates, the roller 28! ismoved upwardly and downwardly imparting the same movement to the frame2'58 and thus to the rod 233. Now on fluid under pressure being suppliedto the inner end of the cylinder 29!, the piston 292 will be blown backto its outer position and the cam 285 brought under the cam roller 28!.

The first above described shifting of the cam, or operation of the camknockout structure, occurs at the end of a cutting. operation when thecarrier is at the inner end of its movement. The supplying of fluidtothe cylinder. 29! is under the control of a four-way valve 293 adaptedto be operated by a shortshaft 29 3 connected by a universal coupling 21.5 with the inner end of shaft or rod 226 having a bearing at 29'! andat its outer end provided with a hand lever 298. for manualmanipulation. Also, rigid with the short shaft 224 is an arm carrying aroller 299 adapted to engage a dog 304 at the inner end of movement ofthe carrier 25!.

On the roller engaging this dog, the valve 293 is operated to supplyfluid to the outer end of the cylinder 292 knocking out the cam asabovedescribed and. stopping further reciprocating movements of the rod 283.Also, as this occurs; a lateral extension 39! on an arm of the yoke 289engages a roller 302 and operates aswitch' 303' r v 17 preparing acircuit for the energizing of the motor 2| on the manual closing of asecond switch (not shown) whereby to set said motor in operation, clutchelement 235 having been shifted by manual 238, and through the rapidtraverse means above described, and including the ear 283, continuouslyturn ,the feed screw 232 in a direction opposite to that in which it hasbeen intermittently turned whereby to shift the entire carrier 251andthe cutter units supported therefrom back to starting position I Atthe starting position, the roller 299 will engage a second dog 30reversing the valve 293 sup lying fluid to theinner end of thecylinder2. 1 whe byvo 289 i awn b t e t n position shifting cam 285 to aposition under the roller 28] and also releasing the switch 3ll3 so thatthe latter may open thereby providing a aietv a r p ve ti c l si orthcircuit of motor 2] on operationof the mentioned second switch. The dogs3llfland 384 are mounted on the underside of the bar 3E5 whose onlypurpose is to support these dogs. While the operation of knocking outthe cam and setting in motion the rapid traverse feature, of theinvention has been described as taking place automatically under controlof the dogs 300 and 304 which will be properly located on the bar 305,depending upon the length of mandrel being em ployed, it will beunderstood that the valve 293 may be manually operated. This will bethrough manipulation of hand lever 298 whereby the yoke 289 will beoperated to; stop vertical reciprocation of the rod 283 and also toclose theiswitchv3ll3h portions 3081and 309 are fixed to the posts 264and 265 as by set screws or pins 310. A pair'of plates 3| 1 and 312supported by the body structure 38Tsupport a bracket arm 3I3 at itsupper end having a bo1t'3-l4 passing through a slot 3|5 in a leverelement 3%. At its inner end, element 316 is pivoted at 3 I l to theupper end of a plunger or rod 3l8, which latter at its lower endcarries'a' foot piece 319. The rod 283 which is to be reciprocated bythe cam 285'as above described, is clamped as at 320 to one end of thelever 3? whereby on reciprocation of said rod 283' said lever 316 willbe rocked on the pivot 3; This will cause up and down movements of theplunger 318" and thus of the foot plate 3| 9 rigid with the lower end ofsaid plunger,

The motors 26 and 2? drive the cutters 24 and 25, respectively, and thestructures mounting these motors are duplicates of one another althougharranged a reverse relation and so a description of o'ne of thesestructures will, it.is'

believed, suffice for both, the same identification numerals beingappliedto the corresponding parts in the two structures; 7, N

For themounting of the. motor '26, thereis pro;- vided at the outersideof the cylindrical portion 308 a dovetail piece or mounting plate32I'receive d in-ways in ate-322; a gib'structure 323' being provided.Integralwith the plate 3221s a, plate 324 angularly'related to the plate32! and provided with a dovetailed groove or way 325havinga gib 326 atoneside. In the way 325 there is received a dovetail 'blo'ck'32ladjustable in the wayon manipulation of a screw 328; Rigidyvith he q isase omib qck eli a ing adore.- tailWay33Il therein ari'dreceivmgadovetail block 33i adjustable on the ways 33!! on manipulation crew; J.s 1 I A sc w .31 is .nroyi e iiq i i i f the Plate .2 nd Par s. ca r ihr y a n guide bled;

h tp t d 33 p vo a l m a ea P a 3 .1%. t kfl i a i im t wit said block vand. for pivotal movement relative h re m Al o "t s l teat tsg l side rre p e nd ower. vot s d 334 a d 1. li ne W tone nq he -:aii ..piv a 1 mong e r. 1 the. 9m is mo t d er t r in v. vemento ,thcs u 3. .4, n o e ia move e t bath a i n in or studs 5 and 331. and, ofcourse, foradjustment with the slide.33 l, and, together with the 1atter,-foradjust o 1th. the i ,3 l and tor a s me -W the 'latter as the slideorplatfi 322 is adjus ed. 7

lf f e cu 4- i m u t I n-th ner n 9 the shaft of the motor 26 andsuchshaft passes through a sleeve 338 on which isclamped a harness 339;The latterincludes a pair of spaced plates 340 and .34| a bar 342pivotedto the lower side of plate 34tanda bolt and nut'structure 343adapted on being tightened to clamp theharness l im i be; an rs 339 onthe sleeve 338 and locate the plates 3,48 and 34!. Plate 34l may besecured to the harness struct reby bolts or the like, andbearing on theupper'edges of theplate34l of the harness struc; ture associated witheach motor is the foot 3,1,9. Therefore, on raising of the rod 283, theplunge er 3I8 is depressed; its ;foot 3L9 pressing downwardly on theplates ,34l causes rocking move: ments of the motorsZB and 21 so astocarry thecutters 34 and 25; against any work 131.011 themandrel for thecutting of such work. Then, as the high point of the cam moves fromunder the roller 23F and the rod 283 is lowered, the plunger 3? is drawnupwardly with its foot 3l3 :and'at such timesa coilfspring 3M" anchoredat its lower end to apart of themotof and its upper end' to a bolt 345,on atbra'cket'346; rocks the motor again" on the stud'344' lifting: thecutter 24 away from" the work. It willbe understood that during all ofthis time saidm'otor is rotatingsaid cutter at The posts or bars-12 64'and 2 6 5 ar'e adj ustedver-w tically to properly locate the cutterswith respect to difierent diameters" of work that the machine i maybecalled upon as out, However, such adjust ment will" not necessarilgive the best cutting conditions and we have provided means forlat ra li j 'n f the l st w h. respect t another by rocking of' the motors on'the pair of;

pivot studjs333 and 1 3 3 1. This means includes a bar 341carriedby a,slid' and extending do tvn-;j

wardly into aiposi 'between'lthe plates 3:46am

Such slide 34a. adjustable 10n..th'e turning" of a screw sac pja's tosnifttnefbar'saz an there;

. 0" by rock: the motor. th'eQaXis-representdbytlij pfthdmandrel'aiid;

,4 3 49, its'putef 'nd, .i h receptior f 'ofial' to While thejactualcutterslm y, be securedtoth'e 01-3 shaftsin ffiy dsir'dw sagaswas as secured" in the drawingslweha nuts 352;

ate cmtcihevemstga will be understood that

